what happens to Air bearing systems when the air supply suddenly shuts off ?

Oav Air bearings are made from Aircraft Quality Aluminum and Graphite.

Graphite is a carbon that forms only two bonds with other carbon atoms. This means it has free electrons and the graphite material exists in layers. This enables one layer to slip over another layer, making graphite an excellent lubricant. If the air supply shuts off, Oav Air bearings act as low friction bushings and it won't damage the platform or the bearing.